<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="require.js" data-main="main"></script>
</head>
<body>
<div id="app">

</div>
<script type="text/javascript">
    require(['jquery'],function ($) {
        $('body').css('background','#000')
    })
</script>
</body>
</html>